Why do not use shadow gradle plugin? https://github.com/johnrengelman/shadow

I could use a third party plugin, but I can do it with a few lines anyway, and avoid the extra dependency. My question is primarily what is the recommended solution in the gradle kotlin dsl ecosystem, and why it doesn't seem to be supported as cleanly as in Groovy via the 'jar' task.

With shadow you need 0 lines of code and only one plugin in

plugins{}

block Gradle doesn’t have included tools to build fat/shadow jars, so you always have 2 choices: 1. Write an own task that provide solution good enough for you (for example if you need up-to-date checks to prevent useless rebuilds, you should write additional code) 2. Use a plugin that already implemented it

Shadow plugin works fine with Gradle Kotlin DSL. Plugin is compatible with Kotlin JVM & Kotlin JS based projects.

OK, I'll give it a try, thanks for the clarifications. I'm new to the Gradle ecosystem (coming back to Java after 11 years), so I don't know all the tradeoffs or conventions, but I want to try to use Kotlin everywhere, including in build logic.